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US 9,178,449 B2Granted
Motor drive system control apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNaoyoshi Takamatsu, Masaki Okamura
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNaoyoshi Takamatsu, Masaki Okamura
Estimating the term…
A motor drive system control apparatus includes: a direct current power supply; a three-phase alternating current motor; a first power converter including switching circuits corresponding to each of three phases of the three-phase alternating current motor and a smoothing condenser disposed electrically in parallel with the switching circuits; an estimating device for estimating peak generation timing in which a peak is generated in an inter-terminal voltage VH of the smoothing condenser on the basis of at least one of an operating condition of the three-phase alternating current motor; a switching condition of the switching circuits corresponding to each of the three phases; and a controlling device for controlling a drive condition of the first power converter so the inter-terminal voltage VH (or a VH peak) in the peak generation timing decreases, for a predetermined period from start timing set in a time domain before the estimated peak generation timing.
A motor drive system control apparatus for controlling a motor drive system comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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About 4 years 8 months of term left · ends 4 Jul 2031 (estimated)
The present invention relates to a motor drive system control apparatus which controls a motor drive system for driving a three-phase alternating current motor.
In this type of technical field, there is a technology about pulse width modulation (PWM) control of an inverter (e.g. refer to a patent document 1). According to an apparatus disclosed in the patent document 1, by correcting a PWM signal with a correction signal generator for outputting a correction signal having a symmetric waveform to that of an alternating current output, a waveform of a three-phase alternating current output supplied to a load is corrected in a positively and negatively symmetrical manner, and waveform distortion due to a harmonic can be suppressed.
Incidentally, there is also suggested an apparatus for reducing direct current ripple superimposed on a direct current output voltage (e.g. refer to a patent document 2).
FIG. 1 is a system configuration diagram showing a motor drive system in a first embodiment of the present invention.
FIG. 2 is a block diagram showing a booster circuit control unit in a control apparatus for the motor drive system shown in FIG. 1.
FIG. 3 is a block diagram showing another booster circuit control unit in the control apparatus for the motor drive system shown in FIG. 1.
Hereinafter, various preferred embodiments of the present invention will be explained with reference to the drawings.
Firstly, with reference to FIG. 1, the configuration of a motor drive system 10 in the embodiment will be explained. FIG. 1 is a system configuration diagram showing the configuration of the motor drive system 10.
In FIG. 1, the motor drive system 10 is provided with a control apparatus 100, a boost converter 200, an inverter 300, a smoothing condenser C, a direct current (DC) power supply B, and a three-phase alternating current (AC) motor M1.